docstr: calls numpy argmin with keepdims
docstr_tok: ["calls","numpy","argmin","with","keepdims"]
code: def argmin(x, axis=1, keepdims=True):
      """
      calls numpy argmin with keepdims
      """
      new_shape = list(x.shape)
      new_shape[axis] = 1
      new_shape = tuple(new_shape)
      return np.argmin(x, axis=axis).reshape(new_shape)
  
imports: from builtins import zip
  import numpy
  import pprint
  import pytest
  from neon import NervanaObject
  from neon.backends.autodiff import Autodiff
  from utils import allclose_with_out
label_desc: Use image node_id 5 for calling the CustomFunc obj's underlying member method code with example usage: obj.argmin(x, axis, keepdims) and returns: np